Changes

Compensate for PAL Speedup in Digital Video

2,124 bytes added, 19:13, 15 October 2023
The following lines were added (+) and removed (-):
If you are not familiar with [[PAL Speedup]] then you should read about it to understand the problem and implications of how it adversely impacts digital video.If you are not familiar with [[PAL Speedup]] then you should [[PAL Speedup|read about it]] to understand the problem and implications of how it adversely impacts digital video.== Play PAL movies at correct speed in VLC ==== Play PAL movies at correct speed =====VLC===* SOLUTION FOUND AND VERIFIEDAdjusting playback speed of PAL video to 0.96 in VLC player preferences to compensate for PAL speedup works very well during VLC playback, and using the record function during the playback creates a VLC video clip file which properly shows the added length of the clip due to the speed change.  However, the speed adjustment is not retained in the new video clip created by VLC, therefore, this is not a good method of remastering the video (don't waste your time.)  Just use this method for viewing the PAL video.command line vlc -f videofilename.avi --no-audio-time-stretch --rate=0.96===mplayer===*PARTIAL SOLUTIONTo just slow it down 4% mplayer dvd://1 -speed 96/100Keep tempo, change pitch. Use [ ] keys to change pitch mplayer file.mp3 -af scaletempo=scale=1.0:speed=pitch* ''the temp adjustment necessary or if necessary is unknown at this time!''===smplayer===Now smplayer might be using either mplayer or mpv as the backend video player...===mpv===* SOLUTION FOUND AND VERIFIEDworking with something like this.... mpv --af=scaletempo --speed=.96 videofilename.avi===FFmpeg===Goal of slowing down the video to the desired frame rate of 23.976 fps.== Using ReClock to correct for PAL Speedup ==The original purpose of Reclock, which is a Directshow Filter, is to allow for smooth playback on a PC video monitor for video from other sources.  It turns out that ReClock is also excellent for reversing the PAL Speedup effect.  It will also allow you to reverse PAL Speedup.  Reclock is described as a DirectShow filter which is loaded in place of the default directsound audio renderer. Older versions of ReClock do not include this very useful feature.  Version 1.8.8.4 will include the feature.  '''ReClock is only for Microsoft Windows.'''  ReClock will not only stretch the video to the correct length, it will also fix the audio pitch problem associated with PAL Speedup.  ReClock is also known by the full name: ReClock DirectShow Filter.==Discussion of reversing PAL speedup=={{:Discussion of reversing PAL speedup}}
Bureaucrat, administrator
16,192
edits